Just call in Missingno Master, that guy's pretty darn knowledgeable on these things.
He also gives good insight on the reasons to why the mentioned Pokemon would be swarming around the house.
Also, the charizards would roast the house, even if you've down all of them with the stones. For I don't think it's possible for a human to take aim, and throw about twenty stones at twenty targets before they start shooting long range attacks.
So basically, if your house is flammable, you're toast if you retaliate with force.